Typewriting machine



Feb. 19,` V1929.

F.. A. HART lTYPEYRITING MACHINE Filed May 24, 1927 2 Sheets-Sheet j 1 T vw A TTORNE Y F. A. HART TYPavmI'nING MACHINE 2 Sheets-Sheet 2 Filed lay 24. 1927 IN VEN TOR Y 3M v4. M B

buvL/ ATTORNEY Patented Feb. 19, 1929. i U N 1 E D ST A T as PATENT OFFICE.

FREDERICK An HART, OF NEW `BRITAIN,-

coNNEc'rrcU'i, Assia/Noa To nEmiNG'roN TYPEWRITER COMPANY, yOIE' ILION, NEW YORK, A CORPORATION 0F NEWYORK.

TYPEWRITING AMACHINE.

Application led Hay 24,

My invent-ion relates to typewritng and like machines, and it' has for its principal object to provide certain improvements' in power-operated carriage return mechanism for such machines. To that end my invention consists in certain features of construction and combinations and arrangements kof parts, all of which will be'fully set forth h erein and particularly pointed out in the claims. In the drawings the improveme-nts are shown applied to the carriage return mechanism which has heretofore been employed in the Remington typewriter, which mechanismv is shown well enough for the purposes of this case in my prior Patent No. 1,567,590, dated December29, 1925, and in my application Sr. No. 127,324, i'lled August 5, 1926. The Rem-r ington mechanism being well known o n the market, and being substantially shown 1n the two cases referred to, I have illustrated in the drawing only such parts thereof as are thought necessary to an understanding of the present improvements.

One object hadin mind in the present 1nvention has been better to adapt the mechanism for use on ordinary correspondence typewriters having comparatively narrow and light carriages. The mechanism. shown in my, prior patent was adapted for wlde carriages loaded with adding mechanism, and while it could be used to advantage in lighter machines, it contained mechanism that could be dispensed with or simplified in a machine with a light'carriage'; .and the carriage return mechanism shown in the drawing is accordingly simpler in some respects than that shown in any prior cases.

In my prior patent the usual line lock mechanism of the typewriter is dispensed with andthe right-hand margin stop on the carriage is used to start t-he carriage return mechanism. In ordinary correspondence typewriters, an automatic starting'device for the carriage return mechanism is not usually desirable and inmost instances I omit it. It is sometimes wanted, however, and I accordingly` provide for its use fb't have modified it insuch a way that it does not interfere with the usual line lock mechanism, which mechanism I retain in the typewriter andutilize it as part of the carriage starting mechanism when the latter is required. i

When a user ofthis sort of typewriter does Wish an automatic starter for the carriage return mechanism it is frequently the case that 1927. `serial No. 193,872.

he wishes that mechanism only on v certain classes of work and does not desire it on other classes of work. I have accordingly put in a disablin device so that by an almost instantaneous andoperation the automatic starter canbe rendered operative or inoperative,fas desired.

yOne form of my invention is illustrated in the accompanying drawings all ofwhich are fragmentary in character and show some pialrts of the machine more or less conventiona y.

Fig. 1 is a front view of the left-hand portion of the machine, partly in section.

Fig. 2 is a similar view of the right-hand portion of the machine. i y

Fig. 3 is a plan view showing the middle of the carriage. y

Fig. 4 is a section on the line 4 4 of Fig. 1 and looking towards the right.

y' Fig. 5 is a left-hand side elevationv with the cover plate of the control box removed.

Fig. 6 is an enlarged sectional view ofa disabling device. v

In said drawings, 5 is the base of the typewriter frame, 6 the corner sts, 7 -the top plate, 8 and 10 the front an rear stationar carriage rails, and 11 is the carriage truc including the front bar or rail 12. 13 represents the roller bearings of the carriage, 14 the usual left-hand margin stop, and 15 the usual right-hand margin stop both adjustable in the ordinary way along bars'16 rigid with the front rail 12 of the'carria-ge. The carriage is fed leftward by the usual spring drum and controlled by the usual escapement and other feed mechanism of which none is shown in thev drawing, except the feed rack 17 which is pivoted. to the carriage at 18.

The tabulator mechanism comprises a column stop bar 20 mounted on the carriage by brackets 21 and carrying column stops 22 which are acted on by stop mechanism conventionally represented at 23. This may be the -mechanism described in the application of George A. Seib, filed May 13, 1925, Sr. No. 29,874, and need not be further described except to say that itis operated by a tabulator `key 24 .whose key lever 25 pulls down on a link 26 which throws the stop included in mechanism 23 into the path of the column stops 22 and which by means of a lifter 27 raises the feed rack 17 out of engagement with the -feed inion. y The line loc A mechanism may be similarto and except for a detail hereinafter pointed out may be identical with that sho'wn in the patent to Seib No. 1,345,894, dated July 6, 1920. It includes a flanged plate 28 pivoted in the base 5 at 30 and adapted to have its lower flanged edge swung rearward under hooks on the printing key levers so as to lock them. This swinging is effected by a link 31 pivoted to the piece 28 forward of its pivot and extending upward through or behind one ofthe posts 6 and through the top plate above which it is pivoted to a bell crank 32, which bell crank is controlled by sliding a plate 33 mounted to slide underneath the stationaryv rail 8. At the middle of the machine, this rail has fastened to it by two screws a sort of block or barrel 34 having a bore 35 in which a plunger can slide lengthwise right and left, and can also rock about its axis. The middle part of the barrel 34 is cut away as shown and described in the Seib patent and in this cut-out a block 36 is fastened to said plunger so as to slide and rock therewith. Said block 36 extends upward and rearward into the path of the margin stops 14 and 15.- A sheet metal piece 37 is fastened to the block 36 and extends downward and forward to constitute a carriage release key. By pressing down on this' piece, the stop mechanism can be rocked about the axis of the plunger so as' to bring the stop block 36 out of the path of the margin stops. The cut-out in the barrel 34 is a little wider than the block 36 so as to allow a limited sliding motion to said block, which block normally occupies its right-hand position whence it can be slid a short distance leftward by the margin stop 15 with the result of rocking the plate 28 and locking the keys. This whole mechanism contains a number of details which are not shown in the present drawings but which are shown in the Seib patent and which are well known in the art. I have made only two changes in this mechanism, namely, I have trimmed off the leftehand portion of the finger piece 37 so as to give said piece a straight left-hand edge; and I have slightly modified the means for fastening the block 34 to the rail 8.

The carriage return mechanism heretofore employed comprises an electric motor 40 whose shaft is connected by a flexible connection 41 with a horizontal shaft geared at its forward end by beveled gears 42, 43 with a clutch section 44 loose on a vertical drive shaft 45 having at its upper end a drive pinion 46 meshing with a rack 47 mounted on the under side of the rear bar 48 of the carriage. The rack 47 is mounted on the bar 48 by pin and slot connections allowing to said rack a preliminary motion to effect line spacing.

All of the mechanism from the motor 40 tothe pinion 46, as well as other parts, are mounted as a unit or sub-assembly in a casting 50 secured to the base plate 5 and top plate 7 of the typewriter.

The clutch scot-ion 44 is mated by a clutch section 51 splined on the shaft 45 and con trolled as to its engagement and disengagement by 'a roller or pin 52 projecting from an arm 53 fast on a transverse rock shaft 54 pivoted near its right-hand endvin the casting 50 and pivoted near its left-hand end in an ear 55 of a control-box 56 secured by three screws 57 to the left-hand side of the typewriter frame. The arm 53 is integral with a depending arm 58 to which is pivoted a push rod 60 having on its a spring 61 which tends to rock the shaft 54 so to throw the clutch section 51 into engagement. The rod 60 at its rear end controls the switch of the electric motor, opening said switch when the rod moves rearward.

In order to hold the shaft 54 and the parts connected therewith in their normal positions against the pressure of the spring 61, said shaft has an arm 62 mounted on the left-hand end thereof and projecting into the controlbox 56 where it is normally held down by a latch or detent 63 pivoted on a stud 64 projecting from the wall of the box. 'In the present instance the said stud is prolongedV and it has a collar 65 mounted on it and secured by a set screw to retain the latch against displacement.

The latch 63 may be operated to release the arm 62 by means of a hook 66 normally in position to engage a pin 67 projecting from the latch, said hook at its forward end being pivoted at 68 to a lever arm 70 mounted on a transverse rock shaft 71 which extends through the machine and has a starting key 72 mounted on its right-hand end and lying at the right of the typewriter keyboard. There are some devices in the train of connections from the key 72 to the hook 66 which are not shown in the present instance but which are shown in my patent above referred Y to. A spring 73 connected to the latch 63 and hook 66 serves to return them both to normal position. In the present instance a lug 74is cast onvthe bottom or wall of the box 56 and has a slot 75 cut therein to serve as a guide for the hook 66 and another part.

In some instances contemplated by thc.

present invention no automatic starter is used and in that event the lever arm 7() may be merely an arm fast on the shaft 71. In other instances the machine may be equipped with an automatic starter and in that case the arm is made with a branch 76 projecting forward through a suitable hole 77 in the boX 56; and said arm is loose on the shaft 71. In that event an arm 78 is fastened on the shaft 71 and is provided with a pin 80 for operating the lever arm 70 in the same Inanner as in.my prior patent.

The mechanism at the front of the carriage and at the middle of thefmachine has been modified in the present. instance. The

`block 34 is counter-bored from the front .to

receive t'wo sleeves 81, Fig. 4, one surrounding each of the screws 82 by which thel parts are fastened to the rail 8. A sheet metal casing 83 is pierced in front with holes the size of the screws 82 which pass through said holes and clamp the casing 83l between the .screw heads and the outer ends ot the sleeves 81, thus rigidly fastening said casing in. place, and at the same time through the sleeves 81 rigidly securingthe block 34 to the rail. A pull rod 84 passes through a hole in the lett hand wall of the casing 83 and has its righthand end bent rearward at an upward inclination to form an abutment or stop piece 85 lying in the path of the left-hand margin c stopi14 on the carriage. i In the normal position of the parts the abutment. 85 is something like half an inch to the left of the stop block 36, j is drawn back to the right the stop 14 .will strike abutment85 `and draw it rightward until both they andthe carriage are arrested by the abutment 85 striking againstthestop block36, 37. Except -tor the details above described the rod 84 issimilar to a'rod formerly used and shown in vmy prior patent and application. At its left-hand; end it is pivoted at 86 to a bellr crankk 87 which is pivoted on ashaft 88 mounted in a bracket 90 which is mounted on the top plate v7 of the typewriter.y The horizontal armof the bell crank 87 is pivoted at 91 to a vertical link 92 which at its lower end is pivoted at 93 to a bell cranlr-94 which is pivoted on a stud 95 projecting` leftward from the bottom of the box 56. The other arm of the bell crank 94-is pivoted ati-96 to a bar 97 which at its rear end has a slot 98 by which it is guided on a stud 100 projecting from the floor of the box 56. The bar 97 is further guided by a flanged roller` 101 journaled on a stud 102. Said bar is formedon its lower edge with a cam part '103 followed by a dwell 104, said cam and dwell for cooperation with a roller 105 journaled at 106 on the arm 62. 'Ihe whole constructionis such that when in the last part of the return motion of the carriage the stop 14 operatesI the abutment 85, the cam`108 engaging the roller 105 will depress the arm 62 and disconnect the clutch 51, 44, andvbreak the'eircuit through the motor. The arm 62 willv be caught by the latch 63. Said latch is preferably made with a main hook portion 107 and above that with a series of very fine ratchet teeth 108, which latter will catch the arm v62 in case the `carriage does not have quite momentum enough to depress saidarm to its fullest extent. The advantage of this mode of operation is set forth in lmyapplication above referred to. In practice the teeth 108 are finer than shown in the drawlng.

In my prior application it is explained that it is not desirable that the latch 63 ever 37 so thaty when the carriagev i be operated to release the arm 62 while the cam 103 and dwell 104 are either in contact with or within a certain distance of the roller 105; in other words, thislatch should not be tripped until after the carriage has traveled several letter spaces leftward from its extremefright-hand position. The present drawings show the same means for preventing this as my said prior application, name-l ly, a pin 110 eccentrically mounted in the bar 97 and underlying the hook 66, in such position that said pin holds the-hook 66 up in operative position when the bar 97 is in normal position as shown in the drawings, but when said bar is displaced slightly forward and downward fromnormal position this supporting pin is removed from the hook 66, allowing'the latter lto drop down to a point where it will not engage the pin 67. j v The train vof mechanism including tlfe bar 97, bellcrank 94, 'etc.`,'is provided with a returning spring 111 vwhich in thewpresent instanceis coiled about the hub of the hell crank 94one endof the spring engaging said bell crank jand theother a fixed part.

In my` former construction a good sized dash-potwas located in the lower rear cor` ner of the control-box 56 and there was a train of mechanism. for operatingsaid dash-` pot and` for connecting it with and disconnecting it from its operating mechanism. All of these parts areomitted in the present instance which considerably lsimplifies the mechanism and enables me to makethe control box thinner in a right and left hand direction. Said control-box is provided with a cover plate 112, Fig. 1, secured thereto by twoY screws at 113, Fig. 5. In the present i`nstance, I utilize this cover plate as a housing for a rheostat. Tothis end, said cover plate is made with -a circular,barrel-shaped portion 114 which is coveredby a cap 115. The stationary parts ot' the rheostat arein the barrel 114 Aand the movable parts thereof are connected with the cap 115, which is so mounted as yto enable it to be turned by hand to different sett-ings indicated visually by graduations 116 on the cap 115, registering with an index 117 on the barrel 114. Two

-conductor posts 118 included in the motor circuit are shown mounted on a piece of insulating material 119 and projecting through a. suitable hole 120 in the floor oi' the controlbox. The rheostat hast-wo spring contacts in such position relative the coi'er plate 112 that whenthe latter is in place they bear on the posts 118 and thus pnt therhcostat into the circuit. The machine'is connected up with the'house circuit and the rheostat is adjusted to give the right' degree of power to the motor. It the carriage goes back too violentlyv additional resistance is thrown into the circuit and if itfdoes not go back with sufiicient lenergy the resist-ance vis diminished.

With light carriages, l.. find that the rapidity so designed that this automatic vreturn can be provided and it is shown in the drawing. In other words` the machine is so designed kthat the automatic starter for the carriage return can be put in or left out as desired.

It has already been pointed out that if no automatic return is wanted the arm would be rigidly mounted on the shaft 71 and the parts 76, 78 and 80 would be omitted. When the automatic return is wanted, the arm 76 is 'provided and is pivoted at 121 to the lower end of a push rod which is made in two sections, namely, a lower section 122 and an upper section 123, the latter pivoted at 124 to a lever arm 125 secured to the rear end of the shaft 88 hereinbefore referred to.l At its forward end, said shaft has secured thereto a lever arm 126 which is pivoted at 127 to a horizontal push rod 128 which at its righthand end passes loosely through a hole in the left-hand wall of the sheet metal casing 83. This rod terminates as shown in Figs 1 and 4 substantially in contact with the lefthand edge of the part 37 which I have made straight for that purpose. The whole construction is such that when the carriage reaches the end of its leftward travel and the block 36, 37 is slid leftward to operate the line lock, said block will push the rod 128 leftward and depress the arm 76 and thus operate the hook 66 to set the carriage return mechanism into operation. In case the automatic return is not desired, a plain shaft 88 is inserted in the bracket 90 to serve as a pivot for the bell crank 87 and suitable means are provided to prevent the shaft from coming out of the braciket. v v

An automatic carriage return brought into action by the arrival of the carriage at the end of a line is usually considered to be useful only on that class of work such as tabulating work where the line always ends at the same letter-space position, in which event it is a considerable advantage. Wherever the machine is used for ordinary writing such as correspondence work, the automatic starter not only is not necessary but it may even be a disadvantage. The line lock may be thrown into operation in the middle of a syllable, in which event the operator desires to depress the release key 37 and allow a few more steps to the carriage to nish'the syllable and it would be a disadvantage ifthe carriage return mechanism started into operation the if the user of the machine also has tabulated work to do at other times. As it isdesirable to have the automatic return used on thetabulator work and to have it out of use whenI ordinary writing is to be done, I have provided means for disabling this mechanism and it is'for this reason that the push rods 122, 123 is made in two sections. Said two sections enter loosely the lower and upper'ends respectively of a vertical bore in a-barrel or block 130 `which also has a cross bore in which is situated a horizontal shaft 131 having on its forward end a cross piece 132 by means of which it can bei turned. In line withl the rods 122,123 the shaft 131 is made with two opposite cut-outs'leaving between them a com'-` paratively thin wall 133, Fig. 6. The construction is such that when the shaft 131 is turned to the position shown in Fig. 6, the block 130 can drop down until the flat lower surface of the wall 133 rests on topof the rod 122. Thisleaves the lower end of rod 123 some distance above. the upper surface of the wall 133, as shown in'Fig. 6, so that even if the line lock be operated, resulting in pushing downward on the rod 123, such downward motion will not be communicated to the rod 122 and `will not start the carriage return mechanism. If, however, the shaft 131 be given a quarterturn by means of the crossy piece 132 the full vwidth of the shaft 131 will then stand between the ends ofthe rods 122, 123. The turning of theshaft will by cam action move the block 130 'slightly upward so that the rod 123 will be substantially in contact with the shaft 131 on the upper side and the rod 122 will be in Contact with it on the lower side. I f now the line lock be operated the downward motion of the rod 123 will be communicated to the rod 122 and the carriage will be automatically returned.

In order to assist in controlling the shaft' 131 the latter is provided with a cross pin 134 adapted to enter notches 135 made at 90 degrees apart in the hub portion of the block 130 where the rear end of the shaft 131 projects therefrom. .'A compression spring 136 is seated in a counterbore in the forward hublike part of the block v13() and acts on a'shoul- .der or flange 137 made by the enlarged for"-` ward end of the shaft 131. This spring holds the pin 134 seated in the notches 135. There are four of these notches and they hold the shaftin any suitable position to which it may be turned.

In order to prevent the block 130 from turn ing around on the rods 122, 123 one of said rods, for example, rod 122, is made with a longitudinal cut or slot 138 and a 140 -i's inserted through the block 130' as cross pin shown in Fig. 6. The rod 122 can be Ainserted in the block only in such positions that the pin 140 enters the slot 138 andthe block can not turn on the rod. It will be understood that if either rod section 122 or 123 be disconnected it can be immediately removed from the block ,130 which can then be slid off the other rod section and removed. But as long as both rod sections are connected up, the block can not become displaced. These rod sections are adjustable as to length in` the ordinary Way so as to get the right action in releasing the latch 63.

In my prior :Patent No. 1,609,943, dated Dec. 7, 1926, I have shown means for preventing the carriage return mechanism from being operated during the time when a tabulator key was being operated. In the present instance means are provided for the same purpose, these consisting of an arm 141 mounted by means of a split clamping hub 142 on the rock shaft 54 in position to be depressed by a pin 143 projecting from the pull link 26 of the tabulator mechanism shown in the present instance. The construction is such that if the tabulator key 24 be depressed while the carriage return mechanism is in operation, the pin 143 will rock the shaft 54 and open the clutch 44, 51 and open the circuit through the motor. If, on the other hand, the tabulator key is in its depressed position when the carriage return mechanism would otherwise come into operation, the pin 143 will prevent the backward rotation of the shaft 54 and prevent the carriage return mechanism from acting until the tabulator key is released. For example, if the tabulator key was depressed after the last column stop 22 had passed the stop device 23, then the carriage would run to its extreme left-hand position and the action of the margin stop 15 on the line lock mechanism would tend to start the motor into operation and draw the carriage back, causing it to be arrested by the tabulator mechanism on its return motion. This will be prevented by the interlocking device just described.

Various changes may be made in the details of construction and arrangement without departing from the invention.

What I claim as new and desire to secure by Letters Patent, is

l. The combination with a step by ste-p moving carriage, a motor for returning the carriage, a key for bringing said motor into action, line lock mechanism acting at the end of a line and including line lock releasing means to enable the carriage to take additional steps, and an automatic starting device capable'of bringing the returning motor into act-ion au tomatically at the end of a line, of means for enabling and disabling said automatic starting device but not affecting the operativeness of said key to cause a return of the carria e, said means settable to enabling and to d1sabling `condition and retaining itssettingso that the automatic starting device can be made operative on one piece of work where it is desired and inoperative on another piece of work whereA it is not desired to be used.

2. The combination with a step by step moving carriage, a. motor for returning said carriage, and line lock meehanismincluding a part at the front of the machine arranged to be displaced leftward by said carriage at the end of aline, of a casing surroundin said part of theline lock mechanism, a pus rod guided in said casing and actuated by said part, and means operated by said push rod for bringing said motor into action to return the carriage.

3. The combination with a stepby ste moving carriage, link lock mechanism inclu ing a device at thc front of the machine arranged to be displaced leftward by said carriage at the end of a line, and a motor for returning said carriage, of a. casing surrounding said part, a rod guided in said casing, and means operated by said rod for bringing said motor into action to return the carriage, a second rod guided in said casing, a sto on the carriage adapted to engage said secon rod and draw it rightward until arrested, and means operated by said second rod for throwing the motor out of action.

4. The combination with a step by step moving carriage, a motor for returning said carriage,rand a device which when operated brings said motor into action, of automatic means for operating said device, sad automatic means including a rod made in two sec-- tions, and an interponent between said two sections, said interponent being shiftable by hand so as in one position to leave lost motion between said two sections whereby the motion of one section will' not be transmitted to the other and the automatic starting mechanism will therefore be inoperative, and in the other position ot said shiftable device the lost motion will be taken up so as to render the automatic starting device operative.

5. Automatic starting mechanism for carriage return mechanism including a rod made in two sections, and a piece interposed between said two sections and shiftable by hand to two positions in one of which positions said piece does and in the other of which it does not .till the space between the two rod sections so that in the first case the automatic return mechanism will be operative and in the second case it will beino rative.

6. Automatic startmg mechanism for carriage return mechanism comprising a rod made in two sections, a housing in which said two sections are inserted and a hand rotatable piece in said housing thinner in one direction than in the other, said piece when turned so as to put its thin diameter between the two rod sections rendering the automatic starting de'vice inoperative and rendering said device operative when said piece is turned to bring its thick diameter between the two rod sections.

l7. Automatic starting mechanism for carriage return mechanism including two rods 120 and 123, a barrel or housing 130, and a hand rotatable piece 131 placed in said barrel across said rod sections and cut away so that when said piece is turned to one position it will and when turned to another position it will not serve to communicate mot-ion from one of said rod sections to the other.

8. Automatic starting mechanism for carriage return mechanism including two rods 120 and 123, a barrel or housing 130, and a hand rotatable piece 131 placed in said barrel across said rod sections and cut away so that when said piece is turned to one position it will and when turned to anotherposition it ill not serve to communicate motion from one of said rod sections to the other, and means to prevent said barrel from turning on said rod sections.

Signed at the borough of Manhattan, city of New York, in the county of New York and State of New York,` this 23rd day of May,

FREDERICK A. HART. 

